Smoke-consuming furnace



(No Model.)

J. M. WILLIAMS. SMOKE GONSUMING FURNAGE.

No. 521,750. Patented June 19, 1894.

1N: NATIONAL umuannrnms UNITED STATES PATENT OFFICE.

.I OHN M. WILLIAMS, OF ST. LOUIS, MISSOURI.

S-MOKE-CNSUMING FURNACE.

SPECIFICATION forming part f Letters Patent NO. 521,750, dated J' une 19, 1894. Application filed March 12, 1894. Serial No. 503,286. (No model.)

To all whom it may concern:

Be it known that I, JOHN M. WILLIAMS, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful'Improvement in VSmoke-Consuming Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specilication.

My invention has for its object the improvement in smoke consuming furnaces, which consists in perforating the door-way lining'between the ash pit and the fire box, forward of the grate, through which a supply of air may be continuously admitted to the tire chamber and be thoroughly heated previous to coming in contact with the boiler.

Figure I is a longitudinal section through the furnace taken on line I-I, Fig. II, and also shows a portion of a boiler in side elevation. Fig. II is a longitudinal section taken on line II-II, Fig. I.

Referring to the drawings, l represents a portion of a boiler, and 2 the lire box of the furnace.

3 represents the fire grate, 4 the bridge wall, and 5 the ash pit. K

6 represents the front-wall, and 7 the front plate of the furnace. In the front plate is formed an opening 8, which communicates with the ash pit, and which is provided with the ash pit door .9, having a regulating damper 10 through which air enters the ash pit,

`and flows upward and passes through perfol rations- 11 formed in the lower side of the door-way lining 12 located between the front of the furnace and the grate bars. After passing through the perforations in the door-way lining the air enters the fire box where it mingles with a spray of steam injected from a steam supply pipe 13 which enters the fire box through the front wall of the furnace above the -door-way.

14 represents' a door through which fuel is introduced into the re box.

The means which I employ for introducing air into the lire box is much more practical perforations in the door-way lining, and

thence into the fire box, where it is thoroughly heated and mingled with heated steam previous to coming in contact w'ith the boiler.

The thorough mingling of the heated air and steam renders the fuel within the lire box highly combustible.

My improved device is eective, simple and 4 durable, and may at a slight cost be applied to any furnace.

I claim as my invention- 1. In a smoke consuming furnace, the combination of a boiler, a fire box, an ash pit, a grate, an opening for admitting air into the ash pit, door-way lining and perforations in the lower side of said lining and through which air passes from the ash pit into the lire box; substantially as and for the purpose set forth.

2. In a smoke consuming furnace, the combination of a boiler, a fire box, a grate, an ash pit, door-waylining and perforations in the lower side of said lining through which air is admitted from the ash pit into the re box,

andmeans for injecting suitable quantities of steam into the fire box; substantially as and In preseuce'of- A. M. EBERsoLE, C. G. EDUARDs. 

